The strong passphrase password generator tool is free to use, and is secure. Please refer to how this works (and why it's safe), including best practices for good password creation, and the likelihood of your created passwords and passphrases being hacked. Enjoy, and please share.
The Strong Random Password & Passphrase Generator Tool
Private: generated in your browser· No data stored or sent· Works offline
16
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Entropy: — bits
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3
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Entropy: — bits
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How this works (and why it’s safe)
All generation uses the Web Crypto API on your device; nothing is uploaded.
The optional breach check uses the “k-anonymity” method — only the first 5 chars of a SHA-1 hash are sent to HIBP.
Best practice: use long, unique secrets (passphrases are great), plus multi-factor authentication.
Passphrase word list: mirrored locally from the EFF Large Wordlist (2016), licensed CC BY 3.0 — stored at /support-files/words-4096.txt.
The “likelihood” line is a rough brute-force estimate at a conservative default (offline fast hash ≈ 1e12 guesses/sec). Real risk also depends on phishing, reuse, and MFA.